The structures of component A1 (=LL-AB664) and component A2 (=LL-AC541), streptothricin-like antibiotics.

Analytical method for streptothricin-type antibiotics: structure of antibiotic LL-BL136.

An analytical procedure was devised which can distinguish members of the streptothricin family of antibiotics. It is based upon an analysis of the hydrolysis products of the antibiotics using a Technicon amino acid autoanalyzer under special conditions. The various fragments including the different streptolidine-amino sugar compounds were well resolved. A basic water-soluble antibiotic discover...

Angei'iandte Ratlrtrf-\nnr= Tt -l -ll Jttul Ll Ll =

Mechanisms of Vasoconstriction Induced by 9,ll-Epithio-ll,12-methano-thromboxane A2 in the Rabbit Coronary Artery

The vasoconstrictor effects of 9,ll-epithio-ll,12-methano-thromboxane A2 (STA2) on smooth muscle strips of the rabbit coronary artery have been investigated in vitro. Right coronary artery (RCA) was more responsive to STA2 than either the left anterior descending or the circumflex coronary artery. On endothelium-denuded RCA strips, the sensitivity and responsiveness to STA2 were greater than ob...

Magnitude of vibration triggering component determines safety of structures

Transmission of blast waves is a complex phenomenon and the characteristics vary with blast design parameters and geo-technical properties of medium. Frequency of vibration and triggering component for structural excitation generally quantifies safe vibration magnitude. At closer distance or higher elevations than the blast locations, vertical or transverse component will be the first arrival t...

Alfred Russel Wallace , Ll

OF THE DISCUSSION. DB. MARTIN L. HOLBROOK: In listening to the able and interesting lecture of Prof. Cope, I could not help wishing that he had given us more detailed information about the personal life of Mr. Wallace. Knowledge of the personal characteristics of a writer often greatly helps us to an understanding of his thought and to a due appreciation of the value of his opinions. From a fri...